Engine.



J. G. GROWDES.

ENGINE.

APPLICATION FILED 110v. 25, 1910.

Patented Apr. 23, 1912.

3 SHEETS-SHEET 1.

Z O L m w W. a

J. G. GROWDBS.

ENGINE.

APPLLOATION FILED NOV. 25, 1910.

Patented Apr. 23, 1912.

3 SHEETSSHEET 2.

J. G. GROWDES.

ENGINE:

APPLICATION FILED NOV. 25, 1910.

1924,4400 N Patented Apr. 23, 1912.

3 SHEETSSHEET 3.

% 31 we 1 1T0;

jToaZZ whom it may concernr dially-di sposed ports,- each aficxsonecBoWnns, or BOSTON, massncnusnrrs;

ENGINE.

'Be it known that I, JACKSON G. GRowDEs,

a citizen of the United States, residing at Boston, inthe county ofSuffolk andState of Massachusetts, have invented certain new and usefulImprovements in Engines, of which the following is a specification,reference being had to the accompanying drawlngs.

This invention relates to improvements engines; and an object of thisinvention to provide an engine which will be'simple in construction andmost eflicient in operation.

In the drawings" illustrating the principle of this invention and thebest 'mode now known .to ciple, Figure'l'i's a central longitudinalsection through so much of an engine as is 'necessary'to illustrate thisinvention; Fig. 2 is a section on the line A-A of Fig. 1; Fig. 3 is asection on the line BB of Fig. 1 but showing the parts in a difierentrelative position; Fig. 4 is a section onthe line- C-C of Fig. 1; Fig. 5is a view similar to Fig. 1 butshows the exhaust ports centrallydisposed and the pistons connected to different crank-shafts; Fig. 6 isa section on the line 'D-ig-j-Dflf' Fig. 5; and Fig. '7 is a viewsimilar to- Figs. 1 and 5 butillustrates this invention as embodied in asingle-, acting engine. v ,The 'wall of the stationary guide cylinder ais chambered, as is shown at a to provide the usual water-jacket auditis further formed near its middle with an inlet passage b the inner endof which opens into a semi-annular chamber a. The latter is incommunication with the interior of the guide-cylinder a throughv two.series of raof thejs'e'riesd, e belng arranged on the arc eta-semicircle(Fig. 2). At each end of therylinder a and on the side thereof oppositefrom the inlet passage 6. {series'gof radially-disposed="exhaustsportsQwlnc ,--as in the eased the admission ports d,'e,- are-are ranged onthe arc ofa""semicirclex(Fig. 4'). Each series f of radiall ports leadfrom the insi e .o ffthe stationary cylinder at to a semi-annularexhaust chamber g which communicates through an 'out-,

let passage k with theusual'exhaust pipe (not shown). l

Within the G m-lame slidably, fitted a hollow cylinder-piston i closedat its ends Specification of Letters Patent. Q'Application filedNovember 25, 1910. Serial No.

me .of applying that prinof crank-disks the inlet ports j -disp0sedexhaust art? But, obviously,

engine.

Patented Apr. 23, 19112. 5945005.

with a semiand formed near its middle ports j and neareach clrcularseries of inlet of its ends with a semicircular series of ex haust ports7e. Theports j, disposed, as is clearly shown 4. Connecting-rods m: arepivotally fastened to the cylinder-piston 2' at one end thereof and alsoto the crank-disks n in the usual manner.

Within the cylinder-piston z'jis slidably 7:: are radially in Figs. 2and fitted a piston o of the usual type. The

piston o is mounted on the inner end of a plston-rod p which passesthrough a stufi'- lng-box g andis fastened at its outer end toacrosshead 7'. By meansof the rod 8 the latter is connected to themiddle pair a at a point one hundred and eighty degrees from the pointsof connection of the rods m. Hence, as is clearly illust-rated in Fig.1, when the inner piston 0- is at the end of its the outerorcylinder-piston i is at theend of the latters travel in the oppositedirection. In this position the inlet ports 03 of the cylinder proper aregister with the inlet ports j of the cylinder-piston z; and.theexhaust 'ports is of the latter are in register or fair with the-exhaustports f of the outer cylinder a. In case the engine is used as anexplosion or internal combustion motor, the waste products of combustionwill be driven piston i'by the fuel the inlet ports 9'.

of the crank-disksthe position shown inlet and exhaust the outer piston73 makes its forward stroke and the inner piston its return stroke, thecharge will be compressed in tween the rear faces of the Furthermovement of the latter in'the same which enters through '22,, the

directions results in bringing the inlet ports e of the guide cylinder ainto register with of the cylinder-piston 2' ports of the same intoexhaust ports f of the and 'the exhaust register.- 'with the idecylinder .at the front end thereof (leftand endin Figs. land 3Suitable-igniters t may 'beprovided and the action. of

explosion at thee-same timed to produce an any desirable predeterminedtime, all ma manner well known to those skilled in this ing fluid may beuse to drive myune'w travel in one direction,

out of the cylinder-.

pon further movement.

s am or other work-y 3, in which the ports are closed and, as-

the space bepistons 71,0.

In Fig. ,5 the exhaust ports f, f" of the guide cylinder are locatednear the mid dle thereof and thereis only a single ex: haust outlet 71.,with which the exhaust ports is in the cylinder-piston iare brought intocommunication through' the exhaust ports f, f and which leads only away;from the engine. Further, in the en:

glne lllustrated in F ig. 5, the cylinder-piston z" is connected bytherod. m, with the crank disks 7)., while the'inner piston o isconnected by the rod p with the crankdi sks n," at the endof the engineopposite from the cranks n. Thus, it will be seen that drive sepathelatter type which exemplifies this invention as thereto ape.

plied. The guide-cylinder. a is formed with only one serles e of inletor admission ports and one series f of exhaust ports. lhecylinder-piston i is open at-one end to allow the pitman p, whlch is,pivotally 3 connected to the inner piston 0", to pass.

Of course, the cOnnectmg-rods m might with perfect ease be linked to therear face ofthe cylinder-piston 2", instead of to its front face asshown in ig. 7. Theuse of radial por as hereinbefore described, enablesme to o tain alarge area in the aggregate, while maintaining the area ofthe individual port small. Free admission and free exhaustresult fromthis provision of a large total area. i For the same length of pistonstroke, greater power can be obtained frolnmy new engine by the use ofthe two pistons one ithin the other and bothmovable. For the same lengthof piston stroke, the ex pansion is twlce'as great as in the ordinaryengine, whereby an increaseinefiiciency is.

ig. 7 is designedto ports of said guide-cylinder.

realized. Since the pistons producing compression move toward r eachother, the

compression is greater ,in my new engine for the same piston, travel(71.6., travel of one piston). It is to be observed that thecylinder-piston 71; serves 'real-ly'as a valve which controls admissionand exhaust.

No special reversing mechanism is needed to reverse my new engine; it,is necessary only to start theeng-i'ne in the'direction in which it is.to move, which may be done, of

course, by turningthe fly-wheel in the (le sired direction. I v

WhileI have herein shown my new engine adapted for use as a, double'acting. two-- cycle internal combustion motor, yet it may be arrangedwithout the exercise of more .than the mechanical skill of. the art tooper- 1 ate as a four-cycle-engine.

I claimi Anengln'ehaving a pair of pistons one ports being substan- 3ting device connected to one end of saidh'ole low piston;v and apower-transmitting, d e'-" posite end of the latter and is connected" tothe other of saidpistons-slidably mounted therein; said hollowvpistonbein with centrally-disposed j inlet a I? vice which. passesslidably through the op ports arranged to be brought into registerrespectivelyywith the, inlet :Iil testimony whereof I hereunto hand inthe presence ofthetwo'undersigned I' witnesses at -Boston Massachusetts,thisj 85" in second day of November, 1910.

JACKSON G. C Witnesses; j Enwann CAnrnn'rnn,- fwnm rlflfiwam.

of"whi ch is hollow and closed at both its ends and within whichismounted the other of said pistons; a stationary guide cylin-r derfor'meda pair of inlet ports and a, pair- '70 I of exhaust ports, said I andexhaust;

